Specific Driving Torques For Screws And Nuts - Komatsu WB93S-5 F50003 Operation & Maintenance Manual

DRIVING TORQUES

4.4.2 SPECIFIC DRIVING TORQUES FOR SCREWS AND NUTS

a Nm (Newton metre): 1 Nm = 0.102 Kgm
ITEM
Cab
Wheels
Front bucket
Backhoe bucket
Engine and transmission
4.4.3 STANDARD DRIVING TORQUES FOR
HOSES WITH ORFS
If not specified otherwise, tighten hose nuts with the torque
indicated in the table.
If it is necessary to replace a hose, always use Komatsu original
spare parts of the same size as those to be replaced.
a Nm (Newton metre): 1 Nm = 0.102 Kgm
Thread diameter (mm)
(a)
9/16" - 18
11/16" - 16
13/16" - 16
1" - 14
1.3/16" - 12
1.7/16" - 12
1.11/16" - 12
2" - 12
178
DESCRIPTION
Front support screws
Rear support screws
Front
Rear
Teeth
Central teeth
Side teeth
Front support central screw
Rear support central screw
Wrench size
(mm)
17
22
24
30
36
41
50
57
kgm
20,4 ± 1
20,4 ± 1
81,6 ± 1
81,6 ± 1
16 ± 1
16 ± 1
16 ± 1
20 ± 1
20 ± 1
a
DRIVING TORQUE
kgm
2,3 - 2,5
3,4 - 3,9
5,2 - 5,8
8,2 - 9,2
12,2 - 13,3
15,3 - 17,3
18,4 - 20,4
20,4 - 24,4
Nm
200 ± 9,8
200 ± 9,8
800 ± 9,8
800 ± 9,8
157 ± 9,8
157 ± 9,8
157 ± 9,8
196 ± 9,8
196 ± 9,8
RKA12600
Nm
23 - 25
33 - 38
51 - 57
80 - 90
120 - 130
150 - 170
180 - 200
200 - 240